Derivatives of indazole and the preparation thereof
CA 1082199 A · Owner: Boehringer Mannheim G.M.B.H. · Inventors: Wiedemann, Fritz; Kampe, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New derivatives of indazole and their preparation are provided of the formula (I):-, (I), wherein R1 is a hydrogen atom or a lower alkyl radical. R' is a hydrogen atom or an acyl radical and R2 is a benzyl radical or a radical of the formula:-, in which X is a reactive residue and Y is a hydroxyl group or X and Y together represent an oxygen atom and when R ' is an, acyl radical, R2 can also be a hydrogen atom the derivatives, have been found to be valuable intermediates for the preparation of useful, pharmacologically-active compounds for example, 3-indazolyl-(4)-oxy-propan-2-ol amines which can bring about an inhibition of adrenergic .beta.-receptors and can therefore, be, used for the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.